diff --git a/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj b/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj
index 920f8e9..399eafc 100644
--- a/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML/ClosedXML.csproj
@@ -102,6 +102,12 @@
     <CodeAnalysisIgnoreBuiltInRules>false</CodeAnalysisIgnoreBuiltInRules>
     <CodeAnalysisFailOnMissingRules>false</CodeAnalysisFailOnMissingRules>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>ClosedXML.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="DocumentFormat.OpenXml, Version=2.0.5022.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.CSharp" />
@@ -281,7 +287,9 @@
     <Compile Include="PathHelper.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <None Include="ClosedXML.snk" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/ClosedXML/ClosedXML/ClosedXML/ClosedXML.snk b/ClosedXML/ClosedXML/ClosedXML/ClosedXML.snk
new file mode 100644
index 0000000..a17cff7
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML/ClosedXML.snk
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLMargins.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLMargins.cs
index 53865ec..2a1e40b 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLMargins.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLMargins.cs
@@ -27,5 +27,13 @@
         /// <summary>Gets or sets the Footer margin.</summary>
         /// <value>The Footer margin.</value>
         Double Footer { get; set; }
+
+        IXLMargins SetLeft(Double value);
+        IXLMargins SetRight(Double value);
+        IXLMargins SetTop(Double value);
+        IXLMargins SetBottom(Double value);
+        IXLMargins SetHeader(Double value);
+        IXLMargins SetFooter(Double value);
+
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLPageSetup.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLPageSetup.cs
index 7105e1d..b74ee42 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLPageSetup.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/IXLPageSetup.cs
@@ -282,5 +282,25 @@
         /// </summary>
         XLPrintErrorValues PrintErrorValue { get; set; }
 
+        IXLPageSetup SetPageOrientation(XLPageOrientation value);
+        IXLPageSetup SetPagesWide(Int32 value);
+        IXLPageSetup SetPagesTall(Int32 value);
+        IXLPageSetup SetScale(Int32 value);
+        IXLPageSetup SetHorizontalDpi(Int32 value);
+        IXLPageSetup SetVerticalDpi(Int32 value);
+        IXLPageSetup SetFirstPageNumber(Int32 value);
+        IXLPageSetup SetCenterHorizontally(); IXLPageSetup SetCenterHorizontally(Boolean value);
+        IXLPageSetup SetCenterVertically(); IXLPageSetup SetCenterVertically(Boolean value);
+        IXLPageSetup SetPaperSize(XLPaperSize value);
+        IXLPageSetup SetScaleHFWithDocument(); IXLPageSetup SetScaleHFWithDocument(Boolean value);
+        IXLPageSetup SetAlignHFWithMargins(); IXLPageSetup SetAlignHFWithMargins(Boolean value);
+        IXLPageSetup SetShowGridlines(); IXLPageSetup SetShowGridlines(Boolean value);
+        IXLPageSetup SetShowRowAndColumnHeadings(); IXLPageSetup SetShowRowAndColumnHeadings(Boolean value);
+        IXLPageSetup SetBlackAndWhite(); IXLPageSetup SetBlackAndWhite(Boolean value);
+        IXLPageSetup SetDraftQuality(); IXLPageSetup SetDraftQuality(Boolean value);
+        IXLPageSetup SetPageOrder(XLPageOrderValues value);
+        IXLPageSetup SetShowComments(XLShowCommentsValues value);
+        IXLPageSetup SetPrintErrorValue(XLPrintErrorValues value);
+
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLMargins.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLMargins.cs
index c2d90b9..896254a 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLMargins.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLMargins.cs
@@ -10,5 +10,13 @@
         public Double Bottom { get; set; }
         public Double Header { get; set; }
         public Double Footer { get; set; }
+
+        public IXLMargins SetLeft(Double value) { Left = value; return this; }
+        public IXLMargins SetRight(Double value) { Right = value; return this; }
+        public IXLMargins SetTop(Double value) { Top = value; return this; }
+        public IXLMargins SetBottom(Double value) { Bottom = value; return this; }
+        public IXLMargins SetHeader(Double value) { Header = value; return this; }
+        public IXLMargins SetFooter(Double value) { Footer = value; return this; }
+
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLPageSetup.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLPageSetup.cs
index d9f9c81..a125d51 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLPageSetup.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/PageSetup/XLPageSetup.cs
@@ -6,28 +6,28 @@
 {
     internal class XLPageSetup : IXLPageSetup
     {
-        public XLPageSetup(IXLPageSetup defaultPageOptions, XLWorksheet worksheet)
+        public XLPageSetup(XLPageSetup defaultPageOptions, XLWorksheet worksheet)
         {
             
             if (defaultPageOptions != null)
             {
-                this.PrintAreas = new XLPrintAreas(defaultPageOptions.PrintAreas as XLPrintAreas, worksheet);
-                this.CenterHorizontally = defaultPageOptions.CenterHorizontally;
-                this.CenterVertically = defaultPageOptions.CenterVertically;
-                this.FirstPageNumber = defaultPageOptions.FirstPageNumber;
-                this.HorizontalDpi = defaultPageOptions.HorizontalDpi;
-                this.PageOrientation = defaultPageOptions.PageOrientation;
-                this.VerticalDpi = defaultPageOptions.VerticalDpi;
+                PrintAreas = new XLPrintAreas(defaultPageOptions.PrintAreas as XLPrintAreas, worksheet);
+                CenterHorizontally = defaultPageOptions.CenterHorizontally;
+                CenterVertically = defaultPageOptions.CenterVertically;
+                FirstPageNumber = defaultPageOptions.FirstPageNumber;
+                HorizontalDpi = defaultPageOptions.HorizontalDpi;
+                PageOrientation = defaultPageOptions.PageOrientation;
+                VerticalDpi = defaultPageOptions.VerticalDpi;
 
-                this.PaperSize = defaultPageOptions.PaperSize;
-                this.pagesTall = defaultPageOptions.PagesTall;
-                this.pagesWide = defaultPageOptions.PagesWide;
-                this.scale = defaultPageOptions.Scale;
+                PaperSize = defaultPageOptions.PaperSize;
+                _pagesTall = defaultPageOptions.PagesTall;
+                _pagesWide = defaultPageOptions.PagesWide;
+                _scale = defaultPageOptions.Scale;
 
                 if (defaultPageOptions.Margins != null)
                 {
-                    this.Margins = new XLMargins()
-                            {
+                    Margins = new XLMargins
+                                  {
                                 Top = defaultPageOptions.Margins.Top,
                                 Bottom = defaultPageOptions.Margins.Bottom,
                                 Left = defaultPageOptions.Margins.Left,
@@ -36,27 +36,27 @@
                                 Footer = defaultPageOptions.Margins.Footer
                             };
                 }
-                this.AlignHFWithMargins = defaultPageOptions.AlignHFWithMargins;
-                this.ScaleHFWithDocument = defaultPageOptions.ScaleHFWithDocument;
-                this.ShowGridlines = defaultPageOptions.ShowGridlines;
-                this.ShowRowAndColumnHeadings = defaultPageOptions.ShowRowAndColumnHeadings;
-                this.BlackAndWhite = defaultPageOptions.BlackAndWhite;
-                this.DraftQuality = defaultPageOptions.DraftQuality;
-                this.PageOrder = defaultPageOptions.PageOrder;
+                AlignHFWithMargins = defaultPageOptions.AlignHFWithMargins;
+                ScaleHFWithDocument = defaultPageOptions.ScaleHFWithDocument;
+                ShowGridlines = defaultPageOptions.ShowGridlines;
+                ShowRowAndColumnHeadings = defaultPageOptions.ShowRowAndColumnHeadings;
+                BlackAndWhite = defaultPageOptions.BlackAndWhite;
+                DraftQuality = defaultPageOptions.DraftQuality;
+                PageOrder = defaultPageOptions.PageOrder;
 
-                this.ColumnBreaks = defaultPageOptions.ColumnBreaks.ToList();
-                this.RowBreaks = defaultPageOptions.RowBreaks.ToList();
+                ColumnBreaks = defaultPageOptions.ColumnBreaks.ToList();
+                RowBreaks = defaultPageOptions.RowBreaks.ToList();
                 Header = new XLHeaderFooter(defaultPageOptions.Header as XLHeaderFooter);
                 Footer = new XLHeaderFooter(defaultPageOptions.Footer as XLHeaderFooter);
-                this.PrintErrorValue = defaultPageOptions.PrintErrorValue;
+                PrintErrorValue = defaultPageOptions.PrintErrorValue;
             }
             else
             {
-                this.PrintAreas = new XLPrintAreas(worksheet);
+                PrintAreas = new XLPrintAreas(worksheet);
                 Header = new XLHeaderFooter();
                 Footer = new XLHeaderFooter();
-                this.ColumnBreaks = new List<Int32>();
-                this.RowBreaks = new List<Int32>();
+                ColumnBreaks = new List<Int32>();
+                RowBreaks = new List<Int32>();
             }
         }
         public IXLPrintAreas PrintAreas { get; private set; }
@@ -111,65 +111,63 @@
         public XLPrintErrorValues PrintErrorValue { get; set; }
         public IXLMargins Margins { get; set; }
 
-        private Int32 pagesWide;
+        private Int32 _pagesWide;
         public Int32 PagesWide 
         {
             get
             {
-                return pagesWide;
+                return _pagesWide;
             }
             set
             {
-                pagesWide = value;
-                if (pagesWide >0)
-                    scale = 0;
+                _pagesWide = value;
+                if (_pagesWide >0)
+                    _scale = 0;
             }
         }
         
-        private Int32 pagesTall;
+        private Int32 _pagesTall;
         public Int32 PagesTall
         {
             get
             {
-                return pagesTall;
+                return _pagesTall;
             }
             set
             {
-                pagesTall = value;
-                if (pagesTall >0)
-                    scale = 0;
+                _pagesTall = value;
+                if (_pagesTall >0)
+                    _scale = 0;
             }
         }
 
-        private Int32 scale;
+        private Int32 _scale;
         public Int32 Scale
         {
             get
             {
-                return scale;
+                return _scale;
             }
             set
             {
-                scale = value;
-                if (scale > 0)
-                {
-                    pagesTall = 0;
-                    pagesWide = 0;
-                }
+                _scale = value;
+                if (_scale <= 0) return;
+                _pagesTall = 0;
+                _pagesWide = 0;
             }
         }
 
         public void AdjustTo(Int32 pctOfNormalSize)
         {
             Scale = pctOfNormalSize;
-            pagesWide = 0;
-            pagesTall = 0;
+            _pagesWide = 0;
+            _pagesTall = 0;
         }
         public void FitToPages(Int32 pagesWide, Int32 pagesTall)
         {
-            this.pagesWide = pagesWide;
-            this.pagesTall = pagesTall;
-            scale = 0;
+            _pagesWide = pagesWide;
+            this._pagesTall = pagesTall;
+            _scale = 0;
         }
 
 
@@ -211,5 +209,26 @@
         //        default: throw new NotImplementedException();
         //    }
         //}
+
+        public IXLPageSetup SetPageOrientation(XLPageOrientation value) { PageOrientation = value; return this; }
+        public IXLPageSetup SetPagesWide(Int32 value) { PagesWide = value; return this; }
+        public IXLPageSetup SetPagesTall(Int32 value) { PagesTall = value; return this; }
+        public IXLPageSetup SetScale(Int32 value) { Scale = value; return this; }
+        public IXLPageSetup SetHorizontalDpi(Int32 value) { HorizontalDpi = value; return this; }
+        public IXLPageSetup SetVerticalDpi(Int32 value) { VerticalDpi = value; return this; }
+        public IXLPageSetup SetFirstPageNumber(Int32 value) { FirstPageNumber = value; return this; }
+        public IXLPageSetup SetCenterHorizontally() { CenterHorizontally = true; return this; }	public IXLPageSetup SetCenterHorizontally(Boolean value) { CenterHorizontally = value; return this; }
+        public IXLPageSetup SetCenterVertically() { CenterVertically = true; return this; }	public IXLPageSetup SetCenterVertically(Boolean value) { CenterVertically = value; return this; }
+        public IXLPageSetup SetPaperSize(XLPaperSize value) { PaperSize = value; return this; }
+        public IXLPageSetup SetScaleHFWithDocument() { ScaleHFWithDocument = true; return this; }	public IXLPageSetup SetScaleHFWithDocument(Boolean value) { ScaleHFWithDocument = value; return this; }
+        public IXLPageSetup SetAlignHFWithMargins() { AlignHFWithMargins = true; return this; }	public IXLPageSetup SetAlignHFWithMargins(Boolean value) { AlignHFWithMargins = value; return this; }
+        public IXLPageSetup SetShowGridlines() { ShowGridlines = true; return this; }	public IXLPageSetup SetShowGridlines(Boolean value) { ShowGridlines = value; return this; }
+        public IXLPageSetup SetShowRowAndColumnHeadings() { ShowRowAndColumnHeadings = true; return this; }	public IXLPageSetup SetShowRowAndColumnHeadings(Boolean value) { ShowRowAndColumnHeadings = value; return this; }
+        public IXLPageSetup SetBlackAndWhite() { BlackAndWhite = true; return this; }	public IXLPageSetup SetBlackAndWhite(Boolean value) { BlackAndWhite = value; return this; }
+        public IXLPageSetup SetDraftQuality() { DraftQuality = true; return this; }	public IXLPageSetup SetDraftQuality(Boolean value) { DraftQuality = value; return this; }
+        public IXLPageSetup SetPageOrder(XLPageOrderValues value) { PageOrder = value; return this; }
+        public IXLPageSetup SetShowComments(XLShowCommentsValues value) { ShowComments = value; return this; }
+        public IXLPageSetup SetPrintErrorValue(XLPrintErrorValues value) { PrintErrorValue = value; return this; }
+
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
index 4cf5c14..7eb5d19 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
@@ -676,19 +676,19 @@
 
             if (sp.Sheet != null) ws.Protection.Protected = sp.Sheet.Value;
             if (sp.Password != null) ws.Protection.PasswordHash = sp.Password.Value;
-            if (sp.FormatCells != null) ws.Protection.FormatCells = sp.FormatCells.Value;
-            if (sp.FormatColumns != null) ws.Protection.FormatColumns = sp.FormatColumns.Value;
-            if (sp.FormatRows != null) ws.Protection.FormatRows = sp.FormatRows.Value;
-            if (sp.InsertColumns != null) ws.Protection.InsertColumns = sp.InsertColumns.Value;
-            if (sp.InsertHyperlinks != null) ws.Protection.InsertHyperlinks = sp.InsertHyperlinks.Value;
-            if (sp.InsertRows != null) ws.Protection.InsertRows = sp.InsertRows.Value;
-            if (sp.DeleteColumns != null) ws.Protection.DeleteColumns = sp.DeleteColumns.Value;
-            if (sp.DeleteRows != null) ws.Protection.DeleteRows = sp.DeleteRows.Value;
-            if (sp.AutoFilter != null) ws.Protection.AutoFilter = sp.AutoFilter.Value;
-            if (sp.PivotTables != null) ws.Protection.PivotTables = sp.PivotTables.Value;
-            if (sp.Sort != null) ws.Protection.Sort = sp.Sort.Value;
-            if (sp.SelectLockedCells != null) ws.Protection.SelectLockedCells = !sp.SelectLockedCells.Value;
-            if (sp.SelectUnlockedCells != null) ws.Protection.SelectUnlockedCells = !sp.SelectUnlockedCells.Value;
+            if (sp.FormatCells != null) ws.Protection.FormatCells = !sp.FormatCells.Value;
+            if (sp.FormatColumns != null) ws.Protection.FormatColumns = !sp.FormatColumns.Value;
+            if (sp.FormatRows != null) ws.Protection.FormatRows = !sp.FormatRows.Value;
+            if (sp.InsertColumns != null) ws.Protection.InsertColumns = !sp.InsertColumns.Value;
+            if (sp.InsertHyperlinks != null) ws.Protection.InsertHyperlinks = !sp.InsertHyperlinks.Value;
+            if (sp.InsertRows != null) ws.Protection.InsertRows = !sp.InsertRows.Value;
+            if (sp.DeleteColumns != null) ws.Protection.DeleteColumns = !sp.DeleteColumns.Value;
+            if (sp.DeleteRows != null) ws.Protection.DeleteRows = !sp.DeleteRows.Value;
+            if (sp.AutoFilter != null) ws.Protection.AutoFilter = !sp.AutoFilter.Value;
+            if (sp.PivotTables != null) ws.Protection.PivotTables = !sp.PivotTables.Value;
+            if (sp.Sort != null) ws.Protection.Sort = !sp.Sort.Value;
+            if (sp.SelectLockedCells != null) ws.Protection.SelectLockedCells = sp.SelectLockedCells.Value;
+            if (sp.SelectUnlockedCells != null) ws.Protection.SelectUnlockedCells = sp.SelectUnlockedCells.Value;
         }
 
         private static void LoadDataValidations(DataValidations dataValidations, XLWorksheet ws)
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index c407725..776a69d 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -2353,7 +2353,7 @@
                  XLOutlineSummaryHLocation.Right);
 
             if (worksheetPart.Worksheet.SheetProperties.PageSetupProperties == null
-                && xlWorksheet.PageSetup.PagesTall > 0 || xlWorksheet.PageSetup.PagesWide > 0)
+                && (xlWorksheet.PageSetup.PagesTall > 0 || xlWorksheet.PageSetup.PagesWide > 0))
                 worksheetPart.Worksheet.SheetProperties.PageSetupProperties = new PageSetupProperties {FitToPage = true};
 
             #endregion
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
index 0383fa7..c4ae5d2 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
@@ -58,7 +58,7 @@
             _style = new XLStyle(this, workbook.Style);
             Internals = new XLWorksheetInternals(new XLCellsCollection(), new XLColumnsCollection(),
                                                  new XLRowsCollection(), new XLRanges());
-            PageSetup = new XLPageSetup(workbook.PageOptions, this);
+            PageSetup = new XLPageSetup((XLPageSetup)workbook.PageOptions, this);
             Outline = new XLOutline(workbook.Outline);
             _columnWidth = workbook.ColumnWidth;
             _rowHeight = workbook.RowHeight;
@@ -645,7 +645,7 @@
             targetSheet.ColumnWidth = ColumnWidth;
             targetSheet.RowHeight = RowHeight;
             targetSheet._style = new XLStyle(targetSheet, _style);
-            targetSheet.PageSetup = new XLPageSetup(PageSetup, targetSheet);
+            targetSheet.PageSetup = new XLPageSetup((XLPageSetup)PageSetup, targetSheet);
             targetSheet.Outline = new XLOutline(Outline);
             targetSheet.SheetView = new XLSheetView(SheetView);
             Internals.MergedRanges.ForEach(
diff --git a/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs b/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs
index b11cc7d..e5f5e2a 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs
@@ -33,4 +33,4 @@
 // [assembly: AssemblyVersion("1.0.*")]
 [assembly: AssemblyVersion("0.57.3.0")]
 [assembly: AssemblyFileVersion("0.57.3.0")]
-[assembly: System.Runtime.CompilerServices.InternalsVisibleTo("ClosedXML_Tests")]
\ No newline at end of file
+[assembly: System.Runtime.CompilerServices.InternalsVisibleTo("ClosedXML_Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100a1fb8ba59167fe734d64128ca73d32c45cb8a117246d09c95c8769db88fe332b0a3396bedd0ea48ee42b0e5796fec0798ca5cb628a9a6de80d35d6c67b936ca1670347b3d4f2b769c8ce2ddcf959dbac6bcd88e6c08751ea1fffa0522de3507193e7035305a8aa008d6c88cca1341b3120fa9c347ab3f97e2d772e2709277da5")]
\ No newline at end of file
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML.snk b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML.snk
new file mode 100644
index 0000000..a17cff7
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML.snk
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
index 9aac251..1c8ef9c 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
@@ -106,6 +106,12 @@
   <PropertyGroup>
     <StartupObject>ClosedXML_Examples.Program</StartupObject>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>ClosedXML.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.ComponentModel.DataAnnotations" />
@@ -211,6 +217,7 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
+    <None Include="ClosedXML.snk" />
   </ItemGroup>
   <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
diff --git a/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML.snk b/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML.snk
new file mode 100644
index 0000000..a17cff7
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML.snk
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj b/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj
index 6e9eadb..090b3f1 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Net3.5/ClosedXML_Net3.5.csproj
@@ -102,6 +102,12 @@
     <CodeAnalysisRuleDirectories>;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Team Tools\Static Analysis Tools\FxCop\\Rules</CodeAnalysisRuleDirectories>
     <CodeAnalysisIgnoreBuiltInRules>true</CodeAnalysisIgnoreBuiltInRules>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>ClosedXML.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="DocumentFormat.OpenXml, Version=2.0.5022.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
     <Reference Include="System" />
@@ -601,7 +607,9 @@
     <Compile Include="Excel\Cells\XLCell_DotNetSpecific.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <None Include="ClosedXML.snk" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML.snk b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML.snk
new file mode 100644
index 0000000..a17cff7
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML.snk
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
index 90129eb..d7e4122 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
@@ -36,6 +36,12 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>ClosedXML.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="DocumentFormat.OpenXml, Version=2.0.5022.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.CSharp" />
@@ -182,6 +188,9 @@
   <ItemGroup>
     <EmbeddedResource Include="Resource\Examples\Ranges\CurrentRowColumn.xlsx" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="ClosedXML.snk" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Misc/SheetProtection.xlsx b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Misc/SheetProtection.xlsx
index 00a70ae..f98b431 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Misc/SheetProtection.xlsx
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Misc/SheetProtection.xlsx
Binary files differ